Hydrochloric acid mist treatment device and hydrochloric acid storage system

Abstract

The utility model discloses a hydrochloric acid mist treatment device and a hydrochloric acid storage system. The hydrochloric acid mist treatment device comprises a washing tower, a suction fan, an alkali liquor component and a mist collecting structure, the washing tower is sequentially provided with a suction port, a mounting port and an air inlet from top to bottom, and the air inlet is used for introducing acid mist; the suction fan is positioned outside the washing tower, and an exhaust pipeline of the suction fan is communicated with the suction port; the alkali liquor assembly comprises an alkali liquor box and a spraying pipe, one end of the spraying pipe is communicated with the alkali liquor box, and the other end of the spraying pipe extends into the washing tower from the mounting opening and is used for spraying alkali liquor; the mist collecting structure is arranged in the washing tower, is positioned at the suction port, is provided with an air gap communicated with the suction port, and is used for adhering acid mist, so that the acid mist can be collected into liquid drops and fall down. According to the scheme, acid mist can be accelerated to enter the washing tower from the hydrochloric acid storage tank through the gas inlet, so that the acid mist removal efficiency is improved, the acid mist is effectively removed, the alkaline filler does not need to be regularly replaced, the convenience is improved, and manpower and cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrochloric acid mist treatment, in particular to a hydrochloric acid mist treatment device and a hydrochloric acid storage system. Background Art

[0002] Hydrochloric acid is an aqueous solution of hydrogen chloride gas. It is a colorless, transparent, monoprotic strong acid. Hydrochloric acid is extremely volatile. The volatilization of the exhaust gas from the hydrochloric acid storage tank easily forms acid mist with water vapor in the air, which not only pollutes the surrounding environment, but also threatens the health of employees.

[0003] Patent CN 206577583 U discloses a hydrochloric acid storage tank acid mist treatment system, which sends the acid mist in the hydrochloric acid tank to a spray tower, removes the acid mist by spraying alkaline solution, and arranges alkaline filler above the spray pipe to remove the acid mist that escapes above the spray pipe, preventing the acid mist from leaking out and polluting the environment and damaging human health.

[0004] However, in this patent, the acid mist in the hydrochloric acid tank diffuses into the spray tower (washing tower) at a slow rate, resulting in relatively low acid mist removal efficiency. In addition, the alkaline filler on the top of the spray tower needs to be replaced regularly, which is relatively cumbersome and increases costs. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and propose a hydrochloric acid mist treatment device to solve the technical problems in the prior art that the acid mist in the hydrochloric acid tank diffuses slowly into the washing tower and the acid mist removal efficiency is relatively low.

[0006] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a hydrochloric acid mist treatment device, comprising:

[0008] The washing tower is provided with a suction port, a mounting port and an air inlet from top to bottom, and the air inlet is used to introduce acid mist;

[0009] a suction fan, located outside the washing tower, and having an exhaust duct connected to the suction port;

[0010] an alkali solution assembly, comprising an alkali solution tank and a spray pipe, wherein one end of the spray pipe is connected to the alkali solution tank, and the other end extends from the installation port into the washing tower for spraying alkali solution; and

[0011] The mist collecting structure is arranged in the washing tower and located at the suction port, and has an air gap connected to the suction port, which is used to attach the acid mist so that the acid mist can be gathered into droplets and fall.

[0012] In some embodiments, the mist collecting structure includes a mist collecting mesh, and the mist collecting mesh has a plurality of mist collecting wires arranged in a horizontal array, and any two adjacent mist collecting wires are spaced apart to form the air gap.

[0013] In some embodiments, each of the mist collecting wires includes a plurality of mist collecting segments connected in sequence along the vertical direction, two adjacent mist collecting segments are connected at an angle, and the extension directions of two adjacent mist collecting segments of each mist collecting segment are the same.

[0014] In some embodiments, a cooling channel is provided in the mist collecting wire, and a coolant flows through the cooling channel.

[0015] In some embodiments, the alkali liquid component also includes a circulating water tank, an alkali liquid pipe, a medicine replenishing valve, a connecting pipe and a liquid delivery pump. The circulating water tank is arranged at the bottom of the washing tower and is connected to the inner cavity of the washing tower. The alkali liquid pipe is connected to the alkali liquid tank and the circulating water tank. The medicine replenishing valve is arranged on the alkali liquid pipe. The connecting pipe is connected to the circulating water tank and the spray pipe. The liquid delivery pump is arranged on the connecting pipe.

[0016] In some embodiments, the connecting pipe includes a connecting main pipe and two connecting branch pipes, one end of each of the two connecting branch pipes is connected to the circulating water tank, and the other end is connected to the connecting main pipe, and the connecting main pipe is connected to the spray pipe;

[0017] There are two liquid-feeding pumps, which are respectively provided on the two connecting branches. The alkali solution assembly further includes a waste liquid absorption tank and an absorption pipe. One end of the absorption pipe is connected to the connecting main pipe and the two connecting branches at the same time, and the other end is connected to the waste liquid absorption tank.

[0018] Wherein, the connecting main pipe, the connecting branch pipe and the absorption pipe are respectively provided with control valves.

[0019] In some embodiments, the alkali solution assembly also includes a dosing barrel, a mixer, a dosing machine, a tap water tank, two water supply pipes and two water supply valves. The dosing barrel is arranged on the alkali solution pipe, the mixer is arranged in the dosing barrel, the dosing machine is arranged in the alkali solution pipe, and is located between the dosing barrel and the circulating water tank. One of the two water supply pipes connects the tap water tank and the dosing barrel, and the other connects the tap water tank and the circulating water tank. The two water supply valves are respectively arranged on the two water supply pipes.

[0020] In some embodiments, the hydrochloric acid mist treatment device further includes a drainage trough, a first drainage pipe, and a second drainage pipe, wherein the first drainage pipe connects the drainage trough with the dosing barrel, and the second drainage pipe connects the circulating water tank with the drainage trough, and the first drainage pipe and the second drainage pipe are respectively provided with a drainage valve;

[0021] Among them, the connection point between the alkali liquid pipe and the circulating water tank, the connection point between the water supply pipe and the circulating water tank, and the connection point between the second drainage pipe and the circulating water tank are arranged in sequence from top to bottom.

[0022] In some embodiments, a plurality of the installation openings are spaced apart along the vertical direction, a plurality of the spray pipes are provided corresponding to the installation openings, and one end of each of the spray pipes extends into the washing tower from the corresponding installation opening.

[0023] In a second aspect, the present invention also provides a hydrochloric acid storage system, comprising the hydrochloric acid mist treatment device as described in any one of the above.

[0024] Compared with the prior art, the hydrochloric acid mist treatment device provided by the present invention has a suction fan that can drive the airflow in the washing tower to be discharged when in operation, so that the washing tower is under negative pressure, thereby accelerating the acid mist from the hydrochloric acid storage tank to enter the washing tower through the air inlet, thereby accelerating the acid mist removal efficiency. At the same time, the acid mist that escapes to the top of the spray pipe can adhere to the mist collection structure when passing through the mist collection structure, and gradually gather into droplets and fall, and is neutralized by the alkaline solution sprayed by the spray pipe, thereby preventing the acid mist from being discharged from the suction port, and achieving effective removal of the acid mist. In this way, there is no need to regularly replace the alkaline filler, which improves convenience and saves manpower and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a hydrochloric acid mist treatment device provided by an embodiment of the present utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the scrubber;

[0027] Figure 3 yes Figure 2 A magnified schematic diagram of the Zhongji fog collection structure;

[0028] Figure 4 yes Figure 1 Partial schematic diagram of the lye assembly;

[0029] Figure 5 yes Figure 1 Schematic diagram of the connecting pipe and waste liquid absorption tank;

[0030] Figure 6 Schematic diagram of a hydrochloric acid storage system provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Scrubber; 11. Suction port; 12. Mounting port; 13. Air inlet; 14. Air inlet pipe; 2. Suction fan; 3. Alkali solution assembly; 31. Alkali solution tank; 32. Spray pipe; 33. Circulating water tank; 34. Alkali solution pipe; 341. Dosing valve; 35. Connecting pipe; 351. Liquid delivery pump; 352. Connecting main pipe; 353. Connecting branch pipe; 36. Control valve; 37. Waste liquid absorption tank; 371. Absorbent Collection pipe; 38. Dosing barrel; 381. Mixer; 382. Dosing machine; 39. Tap water tank; 391. Water supply pipe; 392. Water supply valve; 4. Mist collection structure; 4a. Air gap; 41. Mist collection wire; 42. Mist collection section; 5. Drain trough; 51. First drain pipe; 52. Second drain pipe; 53. Third drain pipe; 54. Drain valve; 6. Hydrochloric acid storage tank; 7. Hydrochloric acid unloading tank; 8. Hydrochloric acid delivery tank. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] In order to solve the technical problems that the acid mist in the hydrochloric acid tank diffuses into the washing tower slowly and the acid mist removal efficiency is relatively low, the utility model provides a hydrochloric acid mist treatment device, which can accelerate the acid mist from the hydrochloric acid storage tank into the washing tower through the air inlet, thereby accelerating the acid mist removal efficiency, and does not require regular replacement of alkaline fillers, thereby improving convenience and saving manpower and costs.

[0035] It should be noted that the hydrochloric acid mist treatment device described in the present invention is used for but not limited to hydrochloric acid storage systems, etc. For the convenience of explanation, in the present invention, only the hydrochloric acid mist treatment device applied to the hydrochloric acid storage system is used as an example for explanation. The principle of applying the hydrochloric acid mist treatment device to other types of equipment is essentially the same as the principle of applying it to the hydrochloric acid storage system, and they will not be repeated here.

[0036] See also Figure 1 and Figure 2 , Figure 1 and Figure 2This is a structural schematic diagram of a hydrochloric acid mist treatment device in an embodiment of the present invention, which includes a washing tower 1, a suction fan 2, an alkali solution component 3 and a mist collecting structure 4; the washing tower 1 is provided with a suction port, a mounting port 12 and an air inlet 13 from top to bottom, and the air inlet 13 is used to introduce acid mist; the suction fan 2 is located outside the washing tower 1, and its exhaust duct is connected to the suction port; the alkali solution component 3 includes an alkali solution tank 31 and a spray pipe 32, one end of the spray pipe 32 is connected to the alkali solution tank 31, and the other end extends from the mounting port 12 into the washing tower 1 for spraying alkali solution; the mist collecting structure 4 is arranged in the washing tower 1 and is located at the suction port, and has an air gap 4a connected to the suction port, which is used to attach the acid mist so that the acid mist can be gathered into droplets and fall.

[0037] In the hydrochloric acid mist treatment device provided by the present invention, the suction fan 2 can drive the air flow in the washing tower 1 to be discharged when working, so that the washing tower 1 is under negative pressure, thereby accelerating the acid mist from the hydrochloric acid storage tank 6 to enter the washing tower 1 via the air inlet 13, and then accelerating the acid mist removal efficiency. At the same time, the acid mist escaping to the top of the spray pipe 32 can adhere to the mist collecting structure 4 when passing through the mist collecting structure 4, and gradually gather into droplets and fall, and is neutralized by the alkali solution sprayed by the spray pipe 32, thereby preventing the acid mist from being discharged from the suction port, and achieving effective removal of the acid mist. In this way, there is no need to regularly replace the alkaline filler, which improves convenience and saves manpower and costs.

[0038] It should be noted that the hydrochloric acid mist treatment device also includes an air inlet pipe 14, one end of which is connected to the air inlet 13, and the other end is connected to the acid mist discharge port of the hydrochloric acid storage tank 6, and is provided with an air inlet valve. In addition, the specific form of the mist collecting structure 4 is not limited, as long as it can intercept and gather acid mist. In one embodiment, the mist collecting structure 4 is set to a plurality of mist collecting plates arranged at intervals so that the acid mist adheres to the surface of the mist collecting plates.

[0039] In this embodiment, see Figure 3 The mist collecting structure 4 includes a mist collecting wire 41 network, which has a plurality of mist collecting wires 41 arranged in a horizontal array. Any two adjacent mist collecting wires 41 are spaced apart to form an air gap 4a.

[0040] In this embodiment, the mist collecting structure 4 is configured as a network of mist collecting wires 41, with multiple mist collecting wires 41 arranged in an array. This allows the acid mist to adhere to the mist collecting wires 41. This reduces the weight of the mist collecting structure 4 while ensuring the contact area between the mist collecting structure 4 and the acid mist, preventing the acid mist from being discharged. It should be noted that in this embodiment, the projections of two adjacent mist collecting wires 41 at the top of the scrubbing tower 1 at least partially overlap, increasing the probability of acid mist adhering to the mist collecting wires 41.

[0041] In one embodiment, each mist collecting wire 41 includes a plurality of mist collecting segments 42 connected in sequence along the vertical direction, two adjacent mist collecting segments 42 are connected at an angle, and the extension directions of two adjacent mist collecting segments 42 of each mist collecting segment 42 are the same.

[0042] In the present embodiment, each mist collecting wire 41 is provided with a plurality of bent and connected pollution collecting sections, further increasing the probability of acid mist adhering to the mist collecting wire 41 and preventing the acid mist from being discharged from the suction port. In addition, in one embodiment, a cooling flow channel is provided in the mist collecting wire 41, and a coolant is circulated in the cooling flow channel. In this way, the speed at which the acid mist is gathered into droplets on the mist collecting wire 41 can be accelerated by circulating the coolant. It should be noted that the coolant circulates in the cooling flow channel and the coolant tank outside the washing tower 1.

[0043] In one embodiment, see Figure 4 and Figure 5 The alkali solution assembly 3 also includes a circulating water tank 33, an alkali solution pipe 34, a drug replenishing valve 341, a connecting pipe 35 and a liquid feeding pump 351. The circulating water tank 33 is arranged at the bottom of the washing tower 1 and is connected to the inner cavity of the washing tower 1. The alkali solution pipe 34 connects the alkali solution tank 31 and the circulating water tank 33. The drug replenishing valve 341 is arranged on the alkali solution pipe 34. The connecting pipe 35 connects the circulating water tank 33 and the spray pipe 32. The liquid feeding pump 351 is arranged on the connecting pipe 35.

[0044] In this embodiment, the alkali liquid pipe 34 transports the alkali liquid in the alkali liquid tank 31 to the circulating water tank 33, and then the liquid delivery pump 351 transports the alkali liquid in the circulating water tank 33 to the spray pipe 32 via the connecting pipe 35. The spray pipe 32 sprays the alkali liquid to neutralize the acid mist. The neutralized solution falls into the circulating water tank 33 again, realizing recycling and improving the utilization rate of the alkali liquid.

[0045] In one embodiment, the connecting pipe 35 includes a connecting main pipe 352 and two connecting branch pipes 353, one end of the two connecting branch pipes 353 is connected to the circulating water tank 33, and the other end is connected to the above-mentioned connecting main pipe 352, and the connecting main pipe 352 is connected to the spray pipe 32; there are two liquid delivery pumps 351, and the two liquid delivery pumps 351 are respectively arranged on the two connecting branch pipes 353. The alkali liquid component 3 also includes a waste liquid absorption tank 37 and an absorption pipe 371, one end of the absorption pipe 371 is simultaneously connected to the above-mentioned connecting main pipe 352 and the two connecting branch pipes 353, and the other end is connected to the waste liquid absorption tank 37; wherein, a control valve 36 is respectively provided on the connecting main pipe 352, the connecting branch pipe 353 and the absorption pipe 371.

[0046] In this embodiment, after the solution in the circulating water tank 33 has been circulated for 24 hours, it is delivered to the waste liquid absorption tank 37 via the liquid delivery pump 351, and new alkali solution is again injected into the circulating water tank 33 via the alkali solution pipe 34. It should be noted that one of the two liquid delivery pumps 351 is operating normally, while the other is in hot standby mode to improve the operational stability of the device. In addition, the two connecting branch pipes 353 are spaced apart in the vertical direction at the connection points with the circulating water tank 33. In addition, multiple control valves 36 are respectively provided in parallel on the connecting main pipe 352 and the absorption pipe 371, and one of the multiple control valves 36 can drain water.

[0047] In one embodiment, the alkali liquid component 3 also includes a dosing barrel 38, a mixer 381, a dosing machine 382, ​​a tap water tank 39, two water supply pipes 391 and two water supply valves 392. The dosing barrel 38 is arranged on the alkali liquid pipe 34, the mixer 381 is arranged in the dosing barrel 38, the dosing machine 382 is arranged in the alkali liquid pipe 34, and is located between the dosing barrel 38 and the circulating water tank 33. One of the two water supply pipes 391 connects the tap water tank 39 and the dosing barrel 38, and the other connects the tap water tank 39 and the circulating water tank 33. The two water supply valves 392 are respectively arranged on the two water supply pipes 391.

[0048] In this embodiment, alkali solution is first transferred from the alkali solution tank 31 to the dosing tank 38. Fresh water is then delivered to the dosing tank 38 via a water supply pipe 391, and the diluted alkali solution is then added to the circulating water tank 33. Simultaneously, the tap water tank 39 is connected to the circulating water tank 33 via another water supply pipe 391, enabling flexible adjustment of the pH level in the circulating water tank 33. It should be noted that in this embodiment, two dosing machines 382 are provided in parallel, used to transfer the alkali solution from the dosing tank 38 to the circulating water tank 33.

[0049] In one embodiment, the hydrochloric acid mist treatment device also includes a drainage trough 5, a first drainage pipe 51 and a second drainage pipe 52. The first drainage pipe 51 connects the drainage trough 5 with the dosing barrel 38, and the second drainage pipe 52 connects the circulating water tank 33 with the drainage trough 5. Drain valves 54 are respectively provided on the first drainage pipe 51 and the second drainage pipe 52; wherein, the connection point between the alkali liquid pipe 34 and the circulating water tank 33, the connection point between the water supply pipe 391 and the circulating water tank 33, and the connection point between the second drainage pipe 52 and the circulating water tank 33 are arranged in sequence from top to bottom.

[0050] In this embodiment, the connections between each pipe and the circulating water tank 33 are configured as described above, allowing fresh water to be pre-filled into the circulating water tank 33 before replenishing the alkali solution to prevent overheating and splashing. Furthermore, a water level warning line is provided in the circulating water tank 33, with the connection between the second drain pipe 52 and the circulating water tank 33 located at the water level warning line.

[0051] It should be noted that in this embodiment, a third drain pipe 53 is also included. One end of the third drain pipe 53 is connected to the drain trough 5, and the other end is connected to the bottom of the circulating water tank 33. The connection between the third drain pipe 53 and the circulating water tank 33 is located below the connection between the connecting branch pipe 353 and the circulating water tank 33. A drain valve 54 is also provided on the third drain pipe 53.

[0052] In one embodiment, a plurality of mounting openings 12 are provided at intervals along the vertical direction, a plurality of spray pipes 32 are provided corresponding to the mounting openings 12 , and one end of each spray pipe 32 extends into the washing tower 1 from the corresponding mounting opening 12 .

[0053] In this embodiment, a plurality of spray pipes 32 are arranged at intervals along the vertical direction in the washing tower 1 to effectively remove the acid mist during its upward movement, reduce the probability of the acid mist escaping to the top of the washing tower 1, and further improve the acid mist removal efficiency.

[0054] In addition, the present invention further provides a hydrochloric acid storage system, which includes the hydrochloric acid mist treatment device described in any one of the above. It should be noted that the detailed structure of the hydrochloric acid mist treatment device of the hydrochloric acid storage system can be referred to the embodiments of the hydrochloric acid mist treatment device described above, and will not be repeated here. Since the hydrochloric acid mist treatment device described above is used in the hydrochloric acid storage system of the present invention, the embodiments of the hydrochloric acid storage system of the present invention include all technical solutions of all embodiments of the hydrochloric acid mist treatment device described above, and the technical effects achieved are also exactly the same, and will not be repeated here.

[0055] In one embodiment, see Figure 6 The hydrochloric acid storage system includes a hydrochloric acid unloading tank 7, a hydrochloric acid delivery tank 8, and multiple hydrochloric acid storage tanks 6. The acid mist discharge outlets of the hydrochloric acid unloading tank 7, the hydrochloric acid delivery tank 8, and each hydrochloric acid storage tank 6 are all connected to an air inlet pipe 14. Specifically, four hydrochloric acid storage tanks 6, one hydrochloric acid unloading tank 7, and one hydrochloric acid delivery tank 8 are installed in the hydrochloric acid area of ​​a nickel sulfate production enterprise. The volatile hydrochloric acid produced by these tanks passes through an acid mist treatment device and is then discharged, thereby improving the defects of the existing process and achieving the desired purpose.

[0056] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the utility model is described in detail:

[0057] In this solution, the acid mist formed in the hydrochloric acid area is sucked into the washing tower 1 of the acid mist treatment device by the suction fan 2. One of the two liquid delivery pumps 351 is in normal operation, and the other is in hot standby mode. Alkali solution is added to the dosing barrel 38, and two dosing machines 382, ​​one in use and one in standby, are used to add the diluted alkali solution to the circulating water tank 33. The liquid delivery pump 351 continuously supplies the solution in the circulating water tank 33 to the two spray layers of the washing tower 1, where it fully contacts the acid mist from the hydrochloric acid area and undergoes a neutralization reaction. After the solution in the circulating water tank 33 is reused for 24 hours, the liquid delivery pump 351 draws it into the waste liquid absorption tank 37. Regardless of whether there is no daily feeding or frequent feeding and unloading, no acid mist is discharged, thereby realizing the recovery and reuse of hydrogen chloride in the tail gas of the hydrochloric acid storage tank 6 and meeting the requirements of environmental emission standards. The hydrochloric acid mist treatment device meets the requirements of environmental protection standards, effectively improves the surrounding environment, and ensures the health of employees.

[0058] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A hydrochloric acid mist treatment device, characterized in that: include: The washing tower is provided with a suction port, a mounting port and an air inlet from top to bottom, and the air inlet is used to introduce acid mist; a suction fan, located outside the washing tower, and having an exhaust duct connected to the suction port; An alkali solution component includes an alkali solution tank and a spray pipe, wherein one end of the spray pipe is connected to the alkali solution tank, and the other end extends from the installation port into the washing tower for spraying alkali solution; and The mist collecting structure is arranged in the washing tower and located at the suction port, and has an air gap connected to the suction port, which is used to attach the acid mist so that the acid mist can be gathered into droplets and fall.

2. The hydrochloric acid mist treatment device according to claim 1, characterized in that: The mist collecting structure comprises a mist collecting mesh, wherein the mist collecting mesh has a plurality of mist collecting wires arranged in a horizontal direction, and any two adjacent mist collecting wires are spaced apart to form the air gap.

3. The hydrochloric acid mist treatment device according to claim 2, characterized in that: Each of the mist collecting wires includes a plurality of mist collecting segments connected in sequence along the vertical direction, two adjacent mist collecting segments are connected at an angle, and the extension directions of two adjacent mist collecting segments of each mist collecting segment are the same.

4. The hydrochloric acid mist treatment device according to claim 2, characterized in that: A cooling channel is provided in the mist collecting wire, and a coolant flows through the cooling channel.

5. The hydrochloric acid mist treatment device according to claim 1, characterized in that: The alkali liquid component also includes a circulating water tank, an alkali liquid pipe, a medicine replenishing valve, a connecting pipe and a liquid delivery pump. The circulating water tank is arranged at the bottom of the washing tower and is connected to the inner cavity of the washing tower. The alkali liquid pipe is connected to the alkali liquid tank and the circulating water tank. The medicine replenishing valve is arranged on the alkali liquid pipe. The connecting pipe is connected to the circulating water tank and the spray pipe. The liquid delivery pump is arranged on the connecting pipe.

6. The hydrochloric acid mist treatment device according to claim 5, characterized in that: The connecting pipe includes a connecting main pipe and two connecting branch pipes, one end of the two connecting branch pipes is connected to the circulating water tank, and the other end is connected to the connecting main pipe, and the connecting main pipe is connected to the spray pipe; There are two liquid-feeding pumps, which are respectively provided on the two connecting branches. The alkali solution assembly further includes a waste liquid absorption tank and an absorption pipe. One end of the absorption pipe is connected to the connecting main pipe and the two connecting branches at the same time, and the other end is connected to the waste liquid absorption tank. Wherein, the connecting main pipe, the connecting branch pipe and the absorption pipe are respectively provided with control valves.

7. The hydrochloric acid mist treatment device according to claim 5, characterized in that: The alkali solution assembly also includes a dosing barrel, a mixer, a dosing machine, a tap water tank, two water supply pipes and two water supply valves. The dosing barrel is arranged on the alkali solution pipe, the mixer is arranged in the dosing barrel, the dosing machine is arranged in the alkali solution pipe, and is located between the dosing barrel and the circulating water tank. One of the two water supply pipes connects the tap water tank and the dosing barrel, and the other connects the tap water tank and the circulating water tank. The two water supply valves are respectively arranged on the two water supply pipes.

8. The hydrochloric acid mist treatment device according to claim 7, characterized in that: The hydrochloric acid mist treatment device further includes a drainage trough, a first drainage pipe, and a second drainage pipe. The first drainage pipe connects the drainage trough with the dosing barrel, and the second drainage pipe connects the circulating water tank with the drainage trough. Drain valves are provided on the first drainage pipe and the second drainage pipe, respectively. Among them, the connection point between the alkali liquid pipe and the circulating water tank, the connection point between the water supply pipe and the circulating water tank, and the connection point between the second drainage pipe and the circulating water tank are arranged in sequence from top to bottom.

9. The hydrochloric acid mist treatment device according to claim 1, characterized in that: A plurality of the installation openings are arranged at intervals along the vertical direction, and a plurality of the spray pipes are arranged corresponding to the installation openings. One end of each of the spray pipes extends into the washing tower from the corresponding installation opening.

10. A hydrochloric acid storage system, characterized in that: It comprises the hydrochloric acid mist treatment device according to any one of claims 1 to 9.

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